Pronounced Üts-gün
An Üzgün is a child (usually of Turkish descent) whose brain did not get enough oxygen at childbirth. This causes it to spasmodically smack its head against poles. The purpose of this is to get a hole through the skull so as to give the brain the oxygen it desires.

English and German synonyms for this breed of child are:

Retard
Dönerkind
Kebabmeister
Jöhänn
Behindi Kindi
Grüschü

Person 1: That kid is smacking his head against the wall.
Person 2: Oh, what an Üzgün!